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-rw-r--r--src/vnet/devices/virtio/virtio_process.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio_process.c b/src/vnet/devices/virtio/virtio_process.c
new file mode 100644
index 00000000000..7a25611bb95
--- /dev/null
+++ b/src/vnet/devices/virtio/virtio_process.c
@@ -0,0 +1,88 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/gso/gro_func.h>
+
+static uword
+virtio_send_interrupt_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ virtio_if_t *vif;
+ f64 timeout = 3153600000.0 /* 100 years */ ;
+ uword event_type, *event_data = 0;
+ virtio_main_t *vim = &virtio_main;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ switch (event_type)
+ {
+ case VIRTIO_EVENT_STOP_TIMER:
+ timeout = 3153600000.0;
+ break;
+
+ case VIRTIO_EVENT_START_TIMER:
+ timeout = 1e-3; /* 1 millisecond */
+ break;
+
+ case ~0:
+ /* *INDENT-OFF* */
+ pool_foreach (vif, vim->interfaces, {
+ if (vif->packet_coalesce || vif->packet_buffering)
+ {
+ virtio_vring_t *vring;
+ vec_foreach (vring, vif->rxq_vrings)
+ {
+ if (vring->mode == VNET_HW_IF_RX_MODE_INTERRUPT ||
+ vring->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
+ vnet_device_input_set_interrupt_pending (
+ vnet_get_main (), vif->hw_if_index,
+ RX_QUEUE_ACCESS (vring->queue_id));
+ }
+ }
+ });
+ /* *INDENT-ON* */
+ break;
+
+ default:
+ clib_warning ("BUG: unhandled event type %d", event_type);
+ break;
+ }
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (virtio_send_interrupt_node) = {
+ .function = virtio_send_interrupt_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "virtio-send-interrupt-process",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */